Tub beater



July 28,1925. 1,547,848

I C.W.UNKLE TUB BEATER Filed Jan. 2, 1920 2 Sheets-Sheet 1 mw rum ".w

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July 28, 1925. 1,547,848

c.w. UNKLE I TUB BEATER Filed Jan. 2, 1920 2 Sheets-Sheet 2 UNITED STATES PATE- 7 Patented July 28,1925.

l v 7 CHARLES W. UNKLE, OF MONROE, MICIIIGAN, ASSIGBTOR TO THE- 'GRILEY-UNKLE ENGINEERING CDMYANY. F MONRQE, MIGHIGAN, A COPIPORATIGN 0F MICHI- GAIN.

TUB HEATER.

Application filed January 2, 1926. Serial No. 348,938.

To all whom it may concern:

Be it known that I, Crmnnns WV. UNKnn, a citizen of the United States of America, residing at Monroe, in the county of Mon roe and State of \lichigan, have invented certain new and useful Improvements in Tub Beaters, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to tub heaters such as are commonly employed in the reduction of paper and similar waste materialto pulp.

ill

accumulate in a heater after. it has been operated for some time.

It is the object of the present invention to equip a tub heater with a rag picking de vice, Whicl'i may be operated whenever desired to remove any accun'iulation oi rags and like tenacious material "from the tub.

A. furtherohject of the invention is to provide an operating mechanism tor such a rag picker, which will permit the exertion or a considerable effort by manual means without undue labor, and which will act to maintain the rag picker in any desire'rlposition which it occupies during removal therefrom of the material which has been .,eparated from that in the tub.

Another object of the invention is to improve the construction disclosed in issued Patent No. 1,244,14ei by providing for the introduction of Water into the flow box,

which is a feature of said construction, so,

as to prevent the pulp from clogging in the fiow hon and thus interfering with'eiiicient operation.

In the drawings: Figure 1 is a plan view of a tub heater improved in accordance With the invention; Figure 2 is a partial section. on the line 2-% of Figure 1;

Figure 3 is a View of the heater in partial Figure 4 is a detail -'n cross section of the 4% of Figure 1.

In these views, 1 designates the elongated tub in which the paper or similar material to he pulped is subjected to the disintegrating influence of water or other liquid. fie, cured in this tub longitudinally is the usual mid-feather 2 of such length and so positioned as to permit the circulation of the ma terial around the tub when said material is impelled at one. side of the mid-"feather.

The spaces formed Within the tub at each side of the mid-feather are designated respectii'cly by the reference characters 2 and 2,'and Within the space 2 is located the usual roll 3, formed of suitable material, and carrying knives or fly-bars cooperating with rag picker, the section being taken on line the usual bed plate (not shown) in the hottom portion of the tub. Said roll is fas tened to a shaft 4 provided at one end with the belt pulley 5 or other suitable driving member. The tub also contains the usual hack fall at 6.

The upper portion of the roll. 3 is enclosed in a hood 7, and a portion or said hood, preferably remote from the. back all 6, is perforated, as indicated at 8. Secured on a rod 9, extending parallel to the shaft 4: across said perforated portion is a series of plates having sharp edges, so that when said rod is reciprocated, said plates Will out such portions of the reduced stock as may be protruding out through said perforations, keeping the perforations clear for the passage of the reduced material as is hereinafter further explained.

Reciprocation of the rod 9 is accomplished by a mechanism comprising a pin 11 mounted transversely upon one'end of said rod and engaging in slots 12 -formed in the slide hearing 15}, said pin being engaged by a pitman 14, actuahle by rotation of an arm 15 connected to, a Worm wheel 16. The Worm ll .driving' said Worm Wheel is itself driven by a pulley l8iwhich is connected by a belt 19 to a pulley 20 mounted upon the end of the shaft 4i opposite to that carrying its drive pulley 5. Thus, it is evident that wvhen the shaft 4 is driven to revolve the r0113, said shaft transmits a reduced rotation to the Worm Wheel 16, which letter,

through the l and pitman 14, continuously reciyorocates the rod 9. Owing to the centrifugal effect of the revolving roll 3, stock is thrown against the interior a face of the curved portion of the roll, such portions of the stock as are material reduced being thus e ected through the perforat1ons 8. Such lar 'e ortions of the stock as ma tend to clog said perforations are either out 0& by the reciprocating plates 10 or pushed back by said plates Within the hood.-

To the perforated portion of the hood there is secured a casing 21 for receiving the material discharged through the perforatio'ns, the bottom of said casing being inclined. At its lower end, said casing is adapted to discharge into an inclined trough or gutter 22, which conducts the material from the hood across the top of the tub 1 Where it may enter some suitable receptacle. The perforated hood 7 in combination with the casing 21, receiving material jected from the hood through the perforations thereof, and the trough 22 fore-onducting the material from the casing is disclosed In the Patent 1,244,144. The present invention improves upon said combination by curing a defect which has interfered with eflicient operation; namely, the tendency of the pulpy material to accumulate unduly within the casing 21,, owing to a lack of sulficient fiuidity. To insure a continuous discharge of the material from said casing, the present invention provides a pipe 23 opening into the higher end of the casing for continuous y discharging Waterinto the casing during operation of the beater, thus reducing the pulpy masswithin the casing'to a sul'ficiently fluid state to'insure itsvpassage through the discharge opening of the casing into chute 22-. A baffle plate 24 is preferably arranged in a slightly spaced relation to the discharge end of the pipe 23 within the casing 21 to spread the Water so that it of the casing and be more efliciently distributed throughout such material as has accumulated Within the casing.

A further feature of the invention is the provisionof the perforated pipe 25 extending parallel to the shaft 4 through the upper portion of the casing in proximity to the perforated portion of the hood. Water being supplied to said pipe through thepipe 25 and being ejected upon the perforated face of the hood to supplement the plates 10 in cleaning pulpy material from said face and to soften such material as clogs the perforations 8 so that the same um}: be more readily removed by the reciprocating plates.

A rag picker for removing fromthe tub tenacious material such as rags, is located in the space 2 and comprises a rock shaft 26 extending parallelto the shaft l above the surface of the material in the tub, said will thoroughly wash the upper end. wall mamas rock shaft having rigidly mounted thereon a row of picker arms 27, the ends of which are curved slightly and preferably pointed. U pon one end of said shaft 2% there is mounted a Worm Wheel 28, which is actuable by the worm 29, having upon the shaft thereof a crank disc 30 provided with an elongated handle or crank pin 31. The shaft 26 is preferably of square cross-section except as regards its journal portions, and a y erabl to the substantially vertical position,

whic is indicated in dash lines in Figure-31 Owing to the circulation of the material in the tub tha direction ofwhich indicated by the arrears in Figure 1, such matenrial as by reason of itssuperior tenacity resists dis integration, lodges against said picker arms and may be removed thereby from the material in the tub by subjecting the shaft 26 to a reverse rotation, whereby the picker arms are returned to their normal horizontal.

position.- The material thus elevated is then removed from the picker arms in any desired manner, this operation bein repeated until the material in the tub has been sufiiciently cleared of rags and like material.

It is to be noted that by employing worm and Worm wheel drive for the shaft 26, the same is held locked in any desired position and more particularly in its raised position which it occupies While being cleared of the material that it has elevated from the tub. By the employment of the described rag picker, the operation of the heater in. reducing the pulpy paper stock is not retarded or uselessly prolonged by the pres enceof rags and like material in the stock which is fed to the tub. i

hat I claim as my invention is:

In a paper pulping machine, the combination with a beater drum, of a hood for) said drum perforated for the discharge of material from the drum, a casing secured to the perforated portion of the hood to receive the discharged material, and a pipe Opening into said casing for supplying a liquid thereto to facilitate the discharge of the material from the casing, and a bafie plate Within said casing opposite the outlet of said 'pipe. I

In testimony whereof I afii'x my signature.

CHARLES omen. 

